0.87 is 87/100 as a fraction.
Since 87/100 is already simplified, the answer is 87/100.
Hope this helps!
X=10
12x-1=12+10x+7
2x=20
X=10
He made his mistake in Step 2. Tom should have subtracted 4/8 instead of 1/8. The mistake is that he was not consistent when he multiplied Denominators (bottom number) must be the same when handling fractions so Tom must multiply both the numerator and denominator by the SAME number to balance it out. 1/2 x 4/4= 4/8. Subtract. 7/8 - 4/8= 3/8. Tom has 3/8 of a gallon of paint leftover.
The rate of change is -29/5x^2
